Slip



March 1931- s. F. TSCHAPPAT SLIP Filed Feb. 20, 1930 3 Sheets-Sheet. 1

INVENTOR.

Jm/m/v .7?" TEiC/MPPA T, BY 8 ATTORNEY.

' March 17, 1931. s. P. TSCHAPPAT 1,797,166

SLIP

Filed Feb. 20, 1930 3 Sheets-Sheet, 2

I N VEN TOR.

A TTORN E Y.

March 17, 1931. s P. TSCHAPPAT 1,797,166

SLIP

Filed Feb. 20, 1930 s Sheets-Sheet. s

I N VEN TOR.

A TTORNE Y.

Patented Mar. 17, 1931 I I Um'ran r gs fireman oFFicE] fsnnnrmm r, rrseHArrAr, or TULSA, OKLAHOMA, Assrenonor onnen'ertr T HAROLD I i 1 GALLAHAN, OFTU'LSA, OKLAHOMA v SLIP My invention relates to improvements in slips for use in connection with the bowl of atubing hanger, while not necessarily restriated tothis use.

c In accordance with my invention, I provide a plurality of downwardly tapered slips which are assembled in a bowl or casing, such as the bowlof a combined tubing hanger and packing-off device. These slips are so constructed that" the width of their upper ends is greater than the diameter of the lower reduced end of the tapered bore of the bowl, rendering it impossible for each slip falling 1 .through or from the bowl and entering the casing-of thewell. This is an important feature of the invention, as ordinarily slips frequently drop intoa well, and this may involve an expensive fishing operation. My imvprovedfslips are also equipped with lifting elements, adapted to be adjusted for extending above the slips, rendering it more con- 7 venient to remove the slips. These lifting elements are attached .to the slips in such a Y -manner-that they may be moved downward- 'ly intorecess means providedin the slips, so that they do not project above the slips and the major portion of the area of the topof the slipsis flat or plane, for engagement with 1 la compressible packing ring.

In the accompanying drawings, forming a part of thi'sspecification, and in which like numerals are employed to designate like parts throughout the same, Figure 1 is a plan View ofa combined tubinghanger and packing olf device, showing the slips in place, the compression ring and expansible packing ring being broken away, Figure 2; is a central vertical longitudinal section throughthe same,taken online 2-2 ofpended in the lower, end of the bowl,

Figure 4 is a plan view of the bowl, showing a slip suspended in the lower end' of the Figure 5'is a perspective viewof'a' slip emf bodyingmy invention,

Figure 1, the compression ring and packing" l vertical longitudinal.

@per portion broken away, showing a slip sus- Figure 6 is a horizontal section taken on line 6-6 of Figure 5,

Figure 7 is adetai-l'ed section taken on line i,

7 -7 of Figure 5,

Figure8 is a plan view ofthe same, Figure 9 is an outer side elevation of a slip embodying a second-form' of the invention,

showing the flexible element or'wire raised,

Figure 10 is a similar view with the wire depressed into the recess, 1 Y I Figure 11 is atransverse section taken on line 1-111 of Figure 10, V t

Figure 11* is a section taken on line11- 11 of Figure 11, I a I I I Figure 12' is an outer side elevation of a slip embodying a third form of my invention,

Figure 13 is a plan view, and,

Figure 14 is asection taken on line 14-14c of Figure 13. 1 I i In the drawings, wherein: for the purpose of illustration, are shown preferred embodiments ofmy inventiomthe numeral 10 designates the bowl of a combined tubing hanger and packingoff device [This bowl is provided-"with an exterior flange 11* to engage with packing 12', arranged upon the shoulder 13 of a casing head 15, arranged upon a' casing 16. The bowl 1.0h'a's a tapered bore 17, decreasing in diameter downwardly, as shown, and is preferablyprovided'at its top with a cylindrical bore 18', forming a shoulder 1-9'. A compressible packing ring 20, formed of rubber or the like, is inserted in the bore 18, above the shoulder, and is forced downwardly by acompression ring 21, hav- 1 ing screw-threaded engagement within the bore 18-. The compression ring-'20 engages the shoulder 19 and forms a gas-tight'joint' with tlie'bowl and with the tubing 22;

The numeral 23 designates slipsembodying my invention, Theseslips taper downwardlyand have the usual serrations'upon their inner faces. Itispreferred to employ three of these slips; The size and taper of eachslipis such, with respect to the size and taper ofthebore 17 of the bowl, that the upper end of each slip has width greater than the diameter of the reduced endof the tapered bore; By this arrangement, shoulda slip drop, WilI becaught-Within the lower end of the bowl and can not fall therefrom. This is an important feature of the invention, as slips of the ordinary construction frequently fall into a well, which incurs considerable expense in its removal.

Each slip is provided upon its outer side or periphery with recesses 24, affording generally vertical ribs 25 and 26, and an upper horizontal rib 27. The upper rib 27 constitutes the top of the slip and is adapted for engagement with the compressible packing ring 20. A longitudinal slot 28 is formed in the upper rib 27 and leads, at its ends, into the recesses 24. A flexible lift 29, preferably a cable or wire, is inserted within the slot 28 with its free ends entering the recesses 24, and these free ends extend upwardly and are anchored to the top of the slip, by means of babbitt 30, Welding or the like.

When the well is being operated or pumped, the slips 23 serve to hold the tubing against accidental dropping. The compressible packing ring being arranged above A the slips engages with the bowl and tubing to form agas-tight joint with the same. In order that the compressible packing may lie flat upon the top of the slips, the flexible lifts are forced downwardly, so that their end portions are housed within the recesses ,24, the intermediate portion of the flexible lift remaining within the slot 28. When it is desired to raise the slips, the packing ring 20 being first removed, the flexible lifts are raised and may be engaged to remove the slips, after the pressure of the tubing is removed from the same.

In Figures 9, 10, 11 and 11*, I have shown a modified form of slip, designated as a whole by the numeral 30. This slip is preferably formed in the same shape and size as the slips 23 so that they can not drop through the bowl. Each slip 30 is provided upon its outer surface with generally vertical ribs 31, and a horizontal rib 32 at its top. These ribs provide an exterior recess 33, for receiving a flexible lift 34, preferably in the form of a cable.

or wire. The lower end of this flexible lift 34 is attached to one rib 31. by means of babbitt or welding, as shown at 34, while the upper end of the lift extends through an opening 35 formed in the horizontal rib 32 and has a handle or head 36 attached thereto.

This handle or head fits within a recess 37,.

the walls of which are spaced from the head 36, whereby it may be conveniently engaged for raising; The arrangement enables the compressible packing ring-to lie flat upon the top of the slips. The flexible lift element in both forms of slips hereinbefore described is permanently attached to the slip, and is movable downwardly into the space or recess to be housed therein.

Referring to Figures 12 to 14, inclusive, the numeral 38 designates a tapered slip, having exterior vertical ribs 39 and 40, forming reward movement of the lift element with re- I spect to the slip, and retains these elements permanently attached.

It is to be understood that the forms of my invention, herewith shown and described, are to be taken as preferred examples of the same, and that various changes in the shape, size and arrangement of parts, may be resorted to, without departing from the spirit of my invention, or the scope of the subjoined claims.

Having thus described my invention, I claim 1. A slip having recess means formed therein, a lift carried by the slip the arrangement being such that the major portion of the lift may be shifted into the recess means and means to prevent the separation of the lift and slip.

2. A slip for a tubing han er or the like, said slip having recess means formed therein, and a flexible lift carried by the slip, the arrangement being such that the major portion of the flexible liftis adapted to be moved into the recess and means to prevent the separation of the lift and slip.

3.. A slip for a tubing hanger or the like, said slip having recess means and an opening in its top leading into the recess means, a flexible lift having its ends secured to the slip and operating within the opening and recess means, the arrangement being such that the major portion of the flexible lift may be moved into the recess means.

4. A slip for a tubing hanger or the like, having spaced ribs formed upon its outer side providing a pair of exterior recesses, said slip having a slot at its top leading into said recesses, a flexible lift passed through the slot and having its ends arranged within the recesses and attached to the slip, the arrangement being such that the major portion of the lift may be movedinto said recesses.

5. A slip for a tubing hanger or the like, having a recess formed therein, and a lift for the slip having a portion vertically movable the lift element with respect to the slip to prevent the separation of the same.

7 A slip for a tubing hanger or the like, having recess means and a slot formed in its top, said slot leading into the recess means,

a lift element having a generally inverted U-shaped portion, said generally inverted U- shaped portion having a transverse end to enter the groove and depending arms to enter the recess means, and means to limit the upward movement of the lift element with respect to the slip to prevent separation of the lift element and slip.

8. A slip for a tubing hanger or the like, having recess means extending through the top of the slip, and a lift for'the slip, said lift being movable to a position above the slip and to a position within therecess to be substantially enclosed thereby, and means to limit the relative movement between the lift and slip.

9. A slip for a tubing hanger or the like, I I

having longitudinal spaced ribs upon its outer side affording recesses, the top of the slip having opening means leading into the recesses, a flexible lift movably mounted within the opening means to be shifted into and out of the recesses and having its ends attached to the slip.

10. A slip for a tubing hanger or the like, having recess means, and a flexible lift having its'ends attached to the slip, the arrangement being such that the major portion of theflexible lift is movable into and out of the recess means.

11. A slip for a tubing hanger or the like,

having a recess, and aflexible lift adapted to V extend above the slip and having one end attached to the slip, the arrangement being such that the major portion of the flexible lift may be moved into the recess.

12. A slip fora tubing hanger or the like, having recess means and openings passing through its top leading into the recessmeans, and a generally inverted U-shaped lift movably mounted within said openings so that its lower ends may enter the recess means, said lower ends having stop elements preventing the separation of the lift and slip.

In testimony whereof I aflix my signature.

SHERIDAN P. TSCHAPPAT.- 

